fix: title behavior on BlockSuite editor (#1264)

tests/libs/page-logic.ts

@@ -1,11 +1,16 @@
 import type { Page } from '@playwright/test';
 
 export async function newPage(page: Page) {
+  await page.waitForSelector('virgo-line');
   // fixme(himself65): if too fast, the page will crash
   await page.getByTestId('sliderBar').getByText('New Page').click({
     delay: 100,
   });
-  await page.waitForTimeout(100);
+  await page.waitForSelector('virgo-line');
+}
+
+export function getBlockSuiteEditorTitle(page: Page) {
+  return page.locator('virgo-line').nth(0);
 }
 
 export async function clickPageMoreActions(page: Page) {